26 Mar
2014
26 Mar
'14
3:09 a.m.
On Tue, 25 Mar 2014 22:51:11 -0400, Rob McEwen said:
On 3/25/2014 10:25 PM, Brielle Bruns wrote:
Like I said in a previous response, if you are going to make rdns a requirement, why not make SPF and DKIM mandatory as well?
many ISPs ALREADY require rDNS. So making that standard official for IPv6 is isn't asking for much! It is a NATURAL progression.
There's still a lot of ancient mail servers out there in v4 land, that were set up before PTRs were pseudo-required by most places, so we end up cutting them some slack under a grandfather clause. There's probably less than a dozen ASNs that have mailservers that speak IPv6 that were deployed before requring PTRs became common, so they have much less of an excuse not to do so....